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Hydrogeochemical evolution and risk assessment of human health in a riverbank filtration site, northeastern China

Author:
Song, Tiejun, Chen, Yaoxuan, Du, Shanghai, Yang, Fengtian
Source:
Human and ecological risk assessment 2017 v.23 no.4 pp. 705-726
ISSN:
1549-7860
Subject:
adsorption, arsenic, children, drinking, drinking water, environmental assessment, filtration, groundwater, groundwater contamination, health effects assessments, human health, hydrogeochemistry, intensive farming, irrigation, manganese, men, riparian areas, risk, rivers, sodium, sodium carbonate, water quality, women, China, United States
Abstract:
Intensive agriculture and industrial activities have resulted in contamination in rivers and groundwater quality, which threatens human health. In this study, we used comprehensive physiochemical indicators to assess the quality of groundwater used for drinking and irrigation in addition to the potential risks to local residents in a riverbank filtration site. Human health risks through drinking water intake and dermal contact were also estimated. Moreover, we analyzed the spatial distribution regularities of health risk values in a riverbank filtration site. The assessment results revealed that NH ₄–N, NO ₂–N, F ⁻, Mn, and As are main contaminants affecting groundwater quality and that 62% of the total samples is suitable for a variety of purposes. All groundwater in the study area is suitable for irrigation based on the sodium adsorption ratio (SAR), residual sodium carbonate (RSC), Na percentage (%Na), and U.S. Salinity Laboratory (USSL) and Wilcox diagrams. The health risk assessment suggests that residents in the study area are at high health risk, and women and children face higher risk than men in both non-carcinogenic and carcinogenic risks. The spatial distribution regularities of health risk values suggest that the human health risk value of each groundwater sample is different in the study area and has certain regularity. Therefore, effective measurements must be taken to address the groundwater contamination and to reduce the human health risks.
Agid:
5689169